Hilary Duff is having a baby girl!

Hilary Duff took to Instagram to announce her pregnancy with boyfriend Matthew Koma. “Guess what guys! @matthewkoma and I made a little princess of our own and we couldn’t be more excited!!!!!!”

The announcement comes on the heels of her big sister, Haylie Duff’s, birth announcement for her second child, daughter Lulu Gray.

The Instagram post reveals a growing bump, and both mom and dad-to-be appear over the moon. In fact, Hilary’s boyfriend, singer-songwriter and music producer, Matthew Koma, shared the same pic, adding, “We made a baby girl! She will be as beautiful and sweet as her mother…@hilaryduff another incredible chapter begins.”

PREVIOUSLY: HAYLIE DUFF IS NOW MOTHER TO TWO DAUGHTERS

Koma and Duff had been dating for about a year before announcing their pregnancy. This is their first child together. This baby will be the second child for Hilary, age 30, as she shares son Luca Cruz, age 6 with ex-husband, retired NHL player, Mike Comrie.

Hilary has been garnering attention with back-to-back People’s Choice Award nominations (2016 & 2017) for starring in TV Land’s comedy-drama, Younger since 2015. But she is perhaps best known for playing the title role in, Lizzie Maguire, which launched her career as both an actor and musician. She followed that up with family movies, Agent Cody Banks (2003), Cheaper By the Dozen (2003), and rom-coms, A Cinderella Story (2004) and Material Girls (2016). She then broke free of her bubblegum pop teen image in more serious fare, According to Greta (2009) & Bloodworth (2010). She has also been amassing attention for the upcoming biopic thriller, The Haunting of Sharon Tate, which is based on the gruesome 1969 murder of a pregnant actress (and wife to director Roman Polanski) by Charles Manson followers.

Her partner, Matthew Koma, has also been successful in his field, as he has collaborated with artists such as Shania Twain and Kelly Clarkson, amongst others. He and Duff actually met while she was working on her latest album, 2015’s Breathe In. Breathe Out.

Duff will be well rehearsed when it comes time for her to hold her own daughter, as she has been snuggling with her sister's newborn girl. She posted a photo of herself with her niece on Instagram Saturday. And with her first born, six year old Luca, now taking jiu jitzu, this working mama is soon to have her hands (and heart) really full.

NEXT: KIM KARDASHIAN SHARES CUDDLY PHOTO OF HER THREE CHILDREN